Modular block



FIG. 1 is a front, top side perspective view of a modular block according to the new design;

FIG. 2 is a front side elevation view thereof;

FIG. 3 is a rear side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown on the drawings depict portions of the modular block that form no part of the claimed design. 

CLAIM The ornamental design for a modular block, as shown and described. 